Electromagnets can be used to lock doors. how could an engineer increase the strength of an electromagnetic lock? check all that apply
a. by increasing the current through the wire
b. by reversing the current through the electromagnet
c. by adding more coils to the electromagnet
d. by increasing the space between the coils in the electromagnet
Answers: 3
Physics, 22.06.2019 14:10
The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).
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Physics, 22.06.2019 18:30
Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions
Answers: 1
Physics, 23.06.2019 01:10
Calculate 9 β 10-5 divided by 3 β 10-9. (box after the "10" in answer is for the
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Physics, 23.06.2019 03:40
Anumber of conditions are required for a population to be in hardy-weinberg equilibrium. which of the following are correct descriptions of the conditions that must be met? check all that apply. a. no mutations b. random mating c. small population d. migration or gene flow e. occurrence of mutations f. no natural selection
Answers: 1
Electromagnets can be used to lock doors. how could an engineer increase the strength of an electrom...
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